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Credit Risk and Fair Value of Financial Instruments Level 3 (Tables)
9 Months Ended
Sep. 30, 2011
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] 
Fair Value, Measurement Inputs, Disclosure [Table Text Block]
The fair value of our debt instruments at September 30, 2011 and December 31, 2010 was as follows:
 
September 30, 2011
 
December 31, 2010
 
(In thousands)
7.875% Debentures due February 2013
$
5,159

 
$
9,092

7.375% Senior Notes due October 2014
193,901

 
194,244

6.75% Senior Notes due April 2015
143,629

 
161,968

6.75% Senior Notes due April 2016
202,311

 
216,653

7.0% Senior Notes due June 2017
306,063

 
302,375

7.625% Senior Notes due October 2018
266,095

 
262,500

7.0% Senior Notes due May 2019
254,375

 
251,250

8.0% Senior Notes due November 2021
159,375

 
158,063

7.5% Senior Notes due April 2027
189,000

 
194,920

Bank credit facility due March 2016
65,000

 

Mortgage notes and other debt, maturities through 2047
37,100

 
37,991

Total fair value of debt instruments
$
1,822,008

 
$
1,789,056